Furnace



A. SMALLWOOD.

FURNACE.

APPLICATION H LED JULY 3L 1918.

Patented Mar. 30,1920,

5 SHEETS-SHEET l.

A. SMALLWOOD.

FURNACE.

APPLICATION FlLED-JULY-fif, 1918.

1,335,203. Patented Mar. 30, 1920.

5 SHEETSSHE ET 2.

A. SMALLWOOD.

FURNACE.

APPLICATION FI ILED JULY 31, I918.

5 SHEETS-SHEET 5.

irnq/ Patented Mar 30, 1920;

UNITED STATES PATENT ornron.

ALFRED SMALLWOOD, OF LONDON, ENGLAND.

FURNACE.

Application filed July 31, 1918.

To all whom it may concern Be it known that I, ALFRED SMALLWOOD, a subject of the King of Great Britain, residing at 12 Hargrave Park, I-Iighgate, Lon don, N., in the county of Middlesex, England, 111etallurgist,have invented Improve ments in or Relating to Furnaces, of which the following is a specification.

This invention comprises certain improvements in or relating to furnaces, and is particularly applicable to furnaces for heating the extremities of articles such as shells, bars, or the like.

According to the present invention, perforations are provided in the outer wall of a heating chamber through which the shells, bars, or the like are adapted to be projected. This heating chamber may be divided by partitions into a series of compartments or in other words there may be a series of' chambers; in each chamber or compartment one or more perforations may be provided each for the reception of a shell, bar, or the like or an elongated opening'may be provided for the reception of a series of shells, bars, or the like arranged side by side. From the side of the heating chamber opposite to that through which the shells, bars, or the like are projected, 'air and gas are adapted to be introduced. Flame produced by the combustion of this air and gas is directed downwardly upon the articles under treatment and the products of combustion pass through an openingor openings below the article or articles under treatment. T his opening or these openings are regulable, as

for instance by tworegulators adapted to be closed toward each other, one on each side of the article under treatment. The products pass into a longitudinal flue or chamber below the heating chambers or compartments.

In order that this invention may be clearly understood and readily carried into practice, reference may be had to the appended explanatory sheets of drawings, upon which Figure 1 is a vertical side elevation of a furnace constructed according to the present invention, the plane of section being on line 12 of Fig. 2. 1

Fig. 2 is a verticalend elevation ofthe furnace shown in Fig. 1, the plane of section being on line 3-4 of the figure last mentioned.

Fig. 8 is a sectional plan, the section being taken on line 5-6 of- Fig. 2.

Specification of Letters Patent. Patented Mar. 30, 1920.

Serial No. 247,643.

Fig. at is a sectional plan, the section being taken on line 7-8 of Fig. 2, and I Fig. 5 is a sectional elevation being taken on line 910 of Fig. 1.

In a convenient embodiment of the present invention, asshown in the drawings, a, in Fig. 2 represents one of a series of heating chambers or compartments extending the length of the furnace and subdivided by partitions 6 shown in broken lines in Fig. 1. c is an opening into each chamber a through which the article such as d to be heated may be projected. Each opening 0 may be formed in a renewable fire;brick block 6. The opening 0 may be cylindrical at. its inner part and coned at its outer part. 6 is a horizontal combustible gas or heat flue extending substantially the length of the furnace and adapted to receive combustible gas or heating gases from a gas producer or firegrate 7'. From this longitudinal flue e a series of conduits g extend upwardly to a point at which they enter the upper parts of the chambers a. From Fig. 1 it will'be noted that in the embodiment shown, two of the ports or conduits g are provided for each chamber (4. Above the gas flue c and to the side of the conduits 9 remote from the chambers a, a longitudinal hot air flue h is provided adapted to supply hot air to the top parts of the chambers a. '2' represent communicating ports, two for each chamber a, by which air from the flue b passes into said chambers a. The ports or conduits g and i are all individually regulable. This individual regulation may be. effected by dampers adapted to be operated through openings j. v

70 represents a longitudinal waste gas flue located below the chambers 01. Z represents oiie of a series of egress ports offering communication between each chamber a and the waste gas flue 7s. The port Z may be regulable, as for instance by a hung or damper m. Air and gas admitted by the ports g, burn with a flame which descends upon the inwardly projected extremity of the article (Z under treatment, and the flame or products egress by way of the opening Z to the Waste gas flue 70. n represents a slag hole located These waste gas lines 9 communicate at their front extremities with four other waste gas fines r located below the tines and which wastegas fiues r communicate at their rear extremitieswith a transverse flue s leading t the stack. t is a transverse air flue to which air is admitted by any suitable provision. The transverse air flue 2 communicates with a series of rearwardly extending air fiues a which at the rear of the furnace communicats with an upper series of forward air fluos o. The upper air fines '0 communicate at their front extremity with a transverse air space w, which communicates with a series of rearwardly extending air flues m. Thesrearwardlyextending air fines m communicate at their rear ex'tremitieswith an ascending hot air line e, which adjoins the hot'air fine h. An efficient recuperator system is thereby provided whereby the air in the flue'h is heated by the waste gases from the line is. As shown, the recuperator system may extend only a partof the length of the structure in order to leave room for the gas generator or fire-grate f. r The system may be so regulated that a slight pressure exists in the heating chambers or compartments so that no air enters in the spaces around the articles under treatment. This pressure can be so balanced that only a slight amount of heat, if any, escapes through the openings around the articles under treatment.

What I claim as my invention and desire to secure by Letters Patent is 1. A furnace, including a heating chamber having an aperture in the wall thereof for the introduction of articles to project into said heating chamber, the heating chamber being divided into a plurality of compartments, a heat distribution chamber communicating with said heating chamber, and a hot air chamber in the form of a flue running longitudinally of the plurality of heating compartments.

2. A furnace, including a heating chamber having an aperture in the wall thereof for tie introduction of an article to project into said heating chamber, said heating chamber being subdivided into a plurality of compartments, a hot air chamber located on the side of the heating chamber opposite to that through which the articles are introduced, and a heat distribution chamber arheating compartments, a hot air chamber an ranged on the side of the heating chamber opposite to that through which the articles are introduced and communicating with said heating chamber, a heat distribution chamber arranged below said hot air chamber, and condults extending from said heat distribution chamber to said heating compart-' heating chamber, a heat distribution chamber located below said hot air chamber and communicating with sa d heating chamber, and a waste gas flue underneath said heatm chamber and running longitudinally thereof? A furnace, including a heating chamber having an aperture in the wall thereof for the introduction of an article to project into said heating chamber, a hot air chamber arranged on the side of said heating chamber opposite to that through which the articles are introduced and communicating with said h eating chamber, a heat distribution chamber arranged subjacent to said hot air chamber and communicatin ith said heating chamber, a waste gas flue located below the heating chamber and extending longitudinally thereof, and a recuperator system disposed below said waste gas flue and said heat distribution chamber and adapted to heat the air supply to said hot air chamber by means of the waste gases egressing from said waste gas flue.

v6. A furnace, including a heating chamber having an aperture in the wall thereof for the introduction of an article to project into said heating chamber, a hot air chamber arranged'on the side of said heating chamber opposite to that through which the articles are introduced and communicating with said heating chamber, a heat distribution chamber arranged subjacent to said hot air chamber and communicating with Said heatingchamber, a waste gas flue located below the heating chamber and extending longiti'idinally thereof, recuperator system disposed below said waste gas flue and said heat distribution chamber, and adapted to heat the air supply to said hot air chamber by means of the waste gases egressing from said waste gas flue, and a gas producer arranged below the waste gas fine and heat distribution chamber.

In witness whereof I have hereunto set my hand in the presence of two witnesses ALFRED SMALLWOOD. Witnesses:

Ami-Ion H. BROWN, EDGAR N. WHEELER. 

